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Simplifying 21x + 12 = 13x + 19 Reorder the terms: 12 + 21x = 13x + 19 Reorder the terms: 12 + 21x = 19 + 13x Solving 12 + 21x = 19 + 13x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13x' to each side of the equation. 12 + 21x + -13x = 19 + 13x + -13x Combine like terms: 21x + -13x = 8x 12 + 8x = 19 + 13x + -13x Combine like terms: 13x + -13x = 0 12 + 8x = 19 + 0 12 + 8x = 19 Add '-12' to each side of the equation. 12 + -12 + 8x = 19 + -12 Combine like terms: 12 + -12 = 0 0 + 8x = 19 + -12 8x = 19 + -12 Combine like terms: 19 + -12 = 7 8x = 7 Divide each side by '8'. x = 0.875 Simplifying x = 0.875
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